关键词: 东部探区, 石炭—二叠系, 页岩气, 成藏, 地质条件

Abstract: The analysis of the East uplift well’s logging and core data，and the results of the organic geochemistry and the
experiment analysis about the intended interval samples reveal that the East uplift of Upper Paleozoic Carboniferous-Permian
mudstone has larger thickness，spreads widely and stably，with main type III kerogen，abundance index（TOC>2.0%），and high
thermal evolution（Ro=1.5%2.6%），which means there has mother rock conditions of shale gas reservoir. Dark mudstone with
high organic carbon content for adsorption states of shale gas provides abundant carrier，and microfracture development provides
excellent reservoir space for the free state of shale gas. At the same time，high quartz mineral content（average SiO2>40%），
makes the lithology brittle and easy to form crack，which comply with in accordance with engineering fracture condition. Some
drilled wells in the Carboniferous-Permian mudstone section have the prevalence of gas logging total hydrocarbon anomaly，
which indicate that the East uplift of Upper Paleozoic carboniferous-Permian has larger shale gas exploration potential.

Key words: East uplift, carboniferous-permian, shale gas, accumulation, geological conditions